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T. F ALLYN.

Bow Spring for Railway Cars. No., 81,969. Patented Sept. 8, 1868.

UNITED STATES PATENT OFFICE.

T. F. ALLYN, OF NYAGK, NEW YORK.

BOW-SPRING FOR RAI LWAY- CARSL Specification forming part of Letters Patent No. 81,969, dated September 8, 1868.

To all whom it may'concem:

Be it known that I, T. F. ALLYN, of Nyack, in the county of Rockland, in the State of New York, have invented a new and Improved Spring for Cars; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, and to the letters and figures marked thereon.

Figure 1 represents a perspective view of the springs as one mode of their application. Fig. 2 represents a transverse section taken in the line X X, Fig. 1. Fig. 4 is a perspective view of the spring detached.

The nature of my invention consists in the construction of a spring composed of one or more plates of metal, either square, rhombic, circular, oval, or any equivalent shape, bent to the form of a bow or half circle, semi-ellipse, or any equivalent shape, so as to have two bearing surfaces or points opposite each other, or nearly so.

To enable others skilled in the art to make and use my invention, I will proceed to describe its construction and operation.

I construct my spring of plates of metal of any required size and thickness. I bend these plates in any convenient way, and temper them as springs are ordinarily tempered. Be-

fore bending the plates I punch holes in their corners or edges, at or near the points where the springs take their bearings, so that when they are applied to cars or other vehicles they may be confined with bolts or lag-screws, or they may be confined in any other manner that would be likely to suggest itself to the minds of mechanics.

It will be observed that these springs are graduated to various loads, in consequence of their novel construction and application.

What I claim as my invention, and desire to secure by Letters Patent, is

1. A bow-spring composed of one or more plates of metal, either square, rhombic, circular, oval, or any equivalent shape, bent to the form of a how, so as to have two outside bearing surfaces or points opposite to each other, or nearly so, substantially as described.

2. The application of the foregoing described plates, in combination with the bolsters or frames of cars or carriages, substantially as described, and for the purpose set forth.

T. 1?. ALLYN.

Witnesses EDM. F. BROWN, 0. M. SWANY. 

